1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 // A BrowserPluginGuest is the browser side of a browser <--> embedder
6 // renderer channel. A BrowserPlugin (a WebPlugin) is on the embedder
7 // renderer side of browser <--> embedder renderer communication.
9 // BrowserPluginGuest lives on the UI thread of the browser process. Any
10 // messages about the guest render process that the embedder might be interested
11 // in receiving should be listened for here.
13 // BrowserPluginGuest is a WebContentsObserver for the guest WebContents.
14 // BrowserPluginGuest operates under the assumption that the guest will be
15 // accessible through only one RenderViewHost for the lifetime of
16 // the guest WebContents. Thus, cross-process navigation is not supported.
18 #ifndef CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_GUEST_H_
19 #define CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_GUEST_H_
24 #include "base/compiler_specific.h"
25 #include "base/memory/linked_ptr.h"
26 #include "base/memory/weak_ptr.h"
27 #include "base/values.h"
28 #include "content/common/edit_command.h"
29 #include "content/common/input/input_event_ack_state.h"
30 #include "content/public/browser/browser_plugin_guest_delegate.h"
31 #include "content/public/browser/web_contents_observer.h"
32 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
33 #include "third_party/WebKit/public/web/WebDragOperation.h"
34 #include "third_party/WebKit/public/web/WebDragStatus.h"
35 #include "third_party/WebKit/public/web/WebInputEvent.h"
36 #include "ui/base/ime/text_input_mode.h"
37 #include "ui/base/ime/text_input_type.h"
38 #include "ui/gfx/rect.h"
41 struct BrowserPluginHostMsg_Attach_Params;
42 struct BrowserPluginHostMsg_ResizeGuest_Params;
43 struct FrameHostMsg_CompositorFrameSwappedACK_Params;
44 struct FrameHostMsg_ReclaimCompositorResources_Params;
45 #if defined(OS_MACOSX)
46 struct FrameHostMsg_ShowPopup_Params;
48 struct ViewHostMsg_TextInputState_Params;
55 class CompositorFrame;
64 class BrowserPluginGuestManager;
65 class RenderViewHostImpl;
66 class RenderWidgetHost;
67 class RenderWidgetHostView;
71 // A browser plugin guest provides functionality for WebContents to operate in
72 // the guest role and implements guest-specific overrides for ViewHostMsg_*
75 // When a guest is initially created, it is in an unattached state. That is,
76 // it is not visible anywhere and has no embedder WebContents assigned.
77 // A BrowserPluginGuest is said to be "attached" if it has an embedder.
78 // A BrowserPluginGuest can also create a new unattached guest via
79 // CreateNewWindow. The newly created guest will live in the same partition,
80 // which means it can share storage and can script this guest.
81 class CONTENT_EXPORT BrowserPluginGuest : public WebContentsObserver {
83 virtual ~BrowserPluginGuest();
85 // The WebContents passed into the factory method here has not been
86 // initialized yet and so it does not yet hold a SiteInstance.
87 // BrowserPluginGuest must be constructed and installed into a WebContents
88 // prior to its initialization because WebContents needs to determine what
89 // type of WebContentsView to construct on initialization. The content
90 // embedder needs to be aware of |guest_site_instance| on the guest's
91 // construction and so we pass it in here.
92 static BrowserPluginGuest* Create(WebContentsImpl* web_contents,
93 BrowserPluginGuestDelegate* delegate);
95 // Returns whether the given WebContents is a BrowserPlugin guest.
96 static bool IsGuest(WebContentsImpl* web_contents);
98 // Returns whether the given RenderviewHost is a BrowserPlugin guest.
99 static bool IsGuest(RenderViewHostImpl* render_view_host);
101 // Returns a WeakPtr to this BrowserPluginGuest.
102 base::WeakPtr<BrowserPluginGuest> AsWeakPtr();
104 // Sets the focus state of the current RenderWidgetHostView.
105 void SetFocus(RenderWidgetHost* rwh, bool focused);
107 // Sets the lock state of the pointer. Returns true if |allowed| is true and
108 // the mouse has been successfully locked.
109 bool LockMouse(bool allowed);
111 // Return true if the mouse is locked.
112 bool mouse_locked() const { return mouse_locked_; }
114 // Called when the embedder WebContents changes visibility.
115 void EmbedderVisibilityChanged(bool visible);
117 // Destroys the guest WebContents and all its associated state, including
118 // this BrowserPluginGuest, and its new unattached windows.
121 // Creates a new guest WebContentsImpl with the provided |params| with |this|
123 WebContentsImpl* CreateNewGuestWindow(
124 const WebContents::CreateParams& params);
126 // Returns the identifier that uniquely identifies a browser plugin guest
127 // within an embedder.
128 int browser_plugin_instance_id() const { return browser_plugin_instance_id_; }
130 bool OnMessageReceivedFromEmbedder(const IPC::Message& message);
132 WebContentsImpl* embedder_web_contents() const {
133 return embedder_web_contents_;
136 // Returns the embedder's RenderWidgetHostView if it is available.
137 // Returns NULL otherwise.
138 RenderWidgetHostView* GetEmbedderRenderWidgetHostView();
140 bool focused() const { return focused_; }
141 bool visible() const { return guest_visible_; }
142 bool is_in_destruction() { return is_in_destruction_; }
144 void UpdateVisibility();
146 void CopyFromCompositingSurface(
147 gfx::Rect src_subrect,
149 const base::Callback<void(bool, const SkBitmap&)>& callback);
151 BrowserPluginGuestManager* GetBrowserPluginGuestManager() const;
153 // WebContentsObserver implementation.
154 virtual void DidCommitProvisionalLoadForFrame(
155 RenderFrameHost* render_frame_host,
157 ui::PageTransition transition_type) OVERRIDE;
159 virtual void RenderViewReady() OVERRIDE;
160 virtual void RenderProcessGone(base::TerminationStatus status) OVERRIDE;
161 virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
162 virtual bool OnMessageReceived(const IPC::Message& message,
163 RenderFrameHost* render_frame_host) OVERRIDE;
165 // Exposes the protected web_contents() from WebContentsObserver.
166 WebContentsImpl* GetWebContents() const;
168 gfx::Point GetScreenCoordinates(const gfx::Point& relative_position) const;
170 // Helper to send messages to embedder. This methods fills the message with
171 // the correct routing id.
172 void SendMessageToEmbedder(IPC::Message* msg);
174 // Returns whether the guest is attached to an embedder.
175 bool attached() const { return embedder_web_contents_ != NULL; }
177 // Attaches this BrowserPluginGuest to the provided |embedder_web_contents|
178 // and initializes the guest with the provided |params|. Attaching a guest
179 // to an embedder implies that this guest's lifetime is no longer managed
180 // by its opener, and it can begin loading resources.
181 void Attach(int browser_plugin_instance_id,
182 WebContentsImpl* embedder_web_contents,
183 const BrowserPluginHostMsg_Attach_Params& params);
185 // Returns whether BrowserPluginGuest is interested in receiving the given
187 static bool ShouldForwardToBrowserPluginGuest(const IPC::Message& message);
189 void DragSourceEndedAt(int client_x, int client_y, int screen_x,
190 int screen_y, blink::WebDragOperation operation);
192 // Called when the drag started by this guest ends at an OS-level.
193 void EndSystemDrag();
195 void RespondToPermissionRequest(int request_id,
197 const std::string& user_input);
199 void PointerLockPermissionResponse(bool allow);
201 void SwapCompositorFrame(uint32 output_surface_id,
204 scoped_ptr<cc::CompositorFrame> frame);
206 void SetContentsOpaque(bool opaque);
209 class EmbedderWebContentsObserver;
211 // BrowserPluginGuest is a WebContentsObserver of |web_contents| and
212 // |web_contents| has to stay valid for the lifetime of BrowserPluginGuest.
213 BrowserPluginGuest(bool has_render_view,
214 WebContentsImpl* web_contents,
215 BrowserPluginGuestDelegate* delegate);
219 void Initialize(int browser_plugin_instance_id,
220 const BrowserPluginHostMsg_Attach_Params& params,
221 WebContentsImpl* embedder_web_contents);
223 bool InAutoSizeBounds(const gfx::Size& size) const;
225 // Message handlers for messages from embedder.
227 void OnCompositorFrameSwappedACK(
229 const FrameHostMsg_CompositorFrameSwappedACK_Params& params);
230 void OnCopyFromCompositingSurfaceAck(int instance_id,
232 const SkBitmap& bitmap);
233 // Handles drag events from the embedder.
234 // When dragging, the drag events go to the embedder first, and if the drag
235 // happens on the browser plugin, then the plugin sends a corresponding
236 // drag-message to the guest. This routes the drag-message to the guest
238 void OnDragStatusUpdate(int instance_id,
239 blink::WebDragStatus drag_status,
240 const DropData& drop_data,
241 blink::WebDragOperationsMask drag_mask,
242 const gfx::Point& location);
243 // Instructs the guest to execute an edit command decoded in the embedder.
244 void OnExecuteEditCommand(int instance_id,
245 const std::string& command);
247 // Returns compositor resources reclaimed in the embedder to the guest.
248 void OnReclaimCompositorResources(
250 const FrameHostMsg_ReclaimCompositorResources_Params& params);
252 void OnLockMouse(bool user_gesture,
253 bool last_unlocked_by_target,
255 void OnLockMouseAck(int instance_id, bool succeeded);
256 void OnPluginDestroyed(int instance_id);
257 // Resizes the guest's web contents.
259 int instance_id, const BrowserPluginHostMsg_ResizeGuest_Params& params);
260 void OnSetFocus(int instance_id, bool focused);
261 // Sets the name of the guest so that other guests in the same partition can
263 void OnSetName(int instance_id, const std::string& name);
264 // Updates the size state of the guest.
265 void OnSetEditCommandsForNextKeyEvent(
267 const std::vector<EditCommand>& edit_commands);
268 // The guest WebContents is visible if both its embedder is visible and
269 // the browser plugin element is visible. If either one is not then the
270 // WebContents is marked as hidden. A hidden WebContents will consume
271 // fewer GPU and CPU resources.
273 // When every WebContents in a RenderProcessHost is hidden, it will lower
274 // the priority of the process (see RenderProcessHostImpl::WidgetHidden).
276 // It will also send a message to the guest renderer process to cleanup
277 // resources such as dropping back buffers and adjusting memory limits (if in
278 // compositing mode, see CCLayerTreeHost::setVisible).
280 // Additionally, it will slow down Javascript execution and garbage
281 // collection. See RenderThreadImpl::IdleHandler (executed when hidden) and
282 // RenderThreadImpl::IdleHandlerInForegroundTab (executed when visible).
283 void OnSetVisibility(int instance_id, bool visible);
284 void OnUnlockMouse();
285 void OnUnlockMouseAck(int instance_id);
286 void OnUpdateGeometry(int instance_id, const gfx::Rect& view_rect);
288 void OnTextInputStateChanged(
289 const ViewHostMsg_TextInputState_Params& params);
291 void OnImeSetComposition(
293 const std::string& text,
294 const std::vector<blink::WebCompositionUnderline>& underlines,
297 void OnImeConfirmComposition(
299 const std::string& text,
300 bool keep_selection);
301 void OnExtendSelectionAndDelete(int instance_id, int before, int after);
302 void OnImeCancelComposition();
303 #if defined(OS_MACOSX) || defined(USE_AURA)
304 void OnImeCompositionRangeChanged(
305 const gfx::Range& range,
306 const std::vector<gfx::Rect>& character_bounds);
309 // Message handlers for messages from guest.
310 void OnHandleInputEventAck(
311 blink::WebInputEvent::Type event_type,
312 InputEventAckState ack_result);
313 void OnHasTouchEventHandlers(bool accept);
314 #if defined(OS_MACOSX)
315 // On MacOS X popups are painted by the browser process. We handle them here
316 // so that they are positioned correctly.
317 void OnShowPopup(RenderFrameHost* render_frame_host,
318 const FrameHostMsg_ShowPopup_Params& params);
320 void OnShowWidget(int route_id, const gfx::Rect& initial_pos);
321 void OnTakeFocus(bool reverse);
322 void OnUpdateFrameName(int frame_id,
324 const std::string& name);
326 // Forwards all messages from the |pending_messages_| queue to the embedder.
327 void SendQueuedMessages();
329 scoped_ptr<EmbedderWebContentsObserver> embedder_web_contents_observer_;
330 WebContentsImpl* embedder_web_contents_;
332 // An identifier that uniquely identifies a browser plugin within an embedder.
333 int browser_plugin_instance_id_;
334 float guest_device_scale_factor_;
335 gfx::Rect guest_window_rect_;
338 bool pending_lock_request_;
340 bool embedder_visible_;
342 // Each copy-request is identified by a unique number. The unique number is
343 // used to keep track of the right callback.
344 int copy_request_id_;
345 typedef base::Callback<void(bool, const SkBitmap&)> CopyRequestCallback;
346 typedef std::map<int, const CopyRequestCallback> CopyRequestMap;
347 CopyRequestMap copy_request_callbacks_;
349 // Indicates that this BrowserPluginGuest has associated renderer-side state.
350 // This is used to determine whether or not to create a new RenderView when
351 // this guest is attached. A BrowserPluginGuest would have renderer-side state
352 // prior to attachment if it is created via a call to window.open and
353 // maintains a JavaScript reference to its opener.
354 bool has_render_view_;
356 // Last seen size of guest contents (by SwapCompositorFrame).
357 gfx::Size last_seen_view_size_;
358 // Last seen size of BrowserPlugin (by OnResizeGuest).
359 gfx::Size last_seen_browser_plugin_size_;
361 bool is_in_destruction_;
363 // Text input type states.
364 ui::TextInputType last_text_input_type_;
365 ui::TextInputMode last_input_mode_;
366 bool last_can_compose_inline_;
368 // This is a queue of messages that are destined to be sent to the embedder
369 // once the guest is attached to a particular embedder.
370 std::deque<linked_ptr<IPC::Message> > pending_messages_;
372 BrowserPluginGuestDelegate* const delegate_;
374 // Weak pointer used to ask GeolocationPermissionContext about geolocation
376 base::WeakPtrFactory<BrowserPluginGuest> weak_ptr_factory_;
378 DISALLOW_COPY_AND_ASSIGN(BrowserPluginGuest);
381 } // namespace content
383 #endif // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_GUEST_H_